This video was shot by a police body camera as police used force on trapped Inauguration protesters on Jan 20, 2017. It was released by the Indypendent, this annotated version explains what cops were doing at various parts of it.
Unicorn Riot has cited a DC Office of Police Complaints report confirming that police attacked protesters against Donald Trump's inauguration with no warning and considerable force. Assistant US Attorney (AUSA) Jennifer Kerkhoff is Deputy Chief of the Felony Major Crimes section of the US Attorney's office in DC, is prosecuting the J20 cases-and now she is attempting to hide the evidence and the body camera video.